根据句意及英文释义写出单词（初二的）
1.Many children get heavy because they don‘t take▁▁ （activies you take to stay healthy) often.
2.Would you like to give me some▁▁ （an idea you give someone about what they should do)?
3.A▁▁ (a person who goes to visit other places)lost his ID card and asked you for help.
4.I▁▁ (use something by paying money )three Jay Chou's CDs from Mrs Li yesterday.